Question: Please, I want to draw, not write a- Draw the query graph. b- Draw the query tree corresponding to the relational algebra expression. c- Draw

Please, I want to draw, not write Please, I want to draw, not write a- Draw the query
graph. b- Draw the query tree corresponding to the relational algebra expression.

a- Draw the query graph. b- Draw the query tree corresponding to the relational algebra expression. c- Draw the initial query tree, then show how the same query tree is optimized by heuristic rules optimization in another figure. SELECT Pnumber, Pname, COUNT () FROM PROJECT, WORKS_ON, EMPLOYEE WHERE Pnumber=Pno AND Ssn=Essn AND Dno =5 GROUP BY Pnumber, Pname

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